mercredi 14 mai 2014

Do you need to ground a Faraday cage?

My memory of college physics is that a Faraday cage works by the fact that all parts of the cage are at the same potential, including all the parts surrounding the interior, so there will be no electric field gradient in the interior. But the actual potential of the cage doesn't matter, so it doesn't need to be grounded to be effective.



I recall studying this for static arrangements, not dynamic. Is grounding necessary for excluding EM waves?



A paper was released in Nature about EM interference for birds navigation.

http://ift.tt/1v51WXn

The author mentioned that the cage was used both grounded and ungrounded to show differing behaviors. I didn't realize that was relevant.



Does grounding help with excluding a particular range frequencies (possibly due to the capacitance of the cage itself)?





via JREF Forum http://ift.tt/T2Vu56

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